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Your present location:Return home >> PRODUCT CENTER >> COMPOSITE EXPANSION AND CONTRACTION INSTALLATIONS >> SSFC bridge expansion and contraction installation
  • Product name: SSFC bridge expansion and contraction installation
  • Product number: b02
  • Views : 43

brief introduction

SSFC series expansion device is my company to bear the national "85" major introduction, digestion, absorption (a dragon) project, the introduction, digestion and absorption of Swiss MAGEBA company patented technology, the development of all domestically produced products.

SSFC series expansion device using the anti fatigue design principle of dynamic design, using the flexible displacement elastic support and independent control system. With the installation of small size, meet the bridge three-dimensional space shift, long service life, comfortable driving, convenient maintenance and other advantages, is widely used in various types of highway bridge, especially suitable for large displacement the suspension bridge, cable-stayed bridge and continuous concrete bridge.

Technology advantage

It can well adapt to the three-dimensional motion of the bridge

As a result of the ball bearing support beams, which can effectively adapt to the bridge due to temperature, load, creep and shrinkage of concrete, earthquake, wind, and other factors caused by the settlement of pier 3D motion, this structure is especially suitable for the floating system bridge based on the design principle.

The structure size relative to other forms of expansion device is greatly reduced, is conducive to the design of bridge structure

The displacement control and load independent transmission system, the supporting box design into a relatively fixed end and a mobile terminal, small size, a larger space for the expansion device and pre embedded around reinforced connection, can effectively improve the anchorage performance of expansion device, convenient bridge structure design.

Transfer system to control displacement and load - independent

As the beam transmission impact load and the main displacement direction is parallel, this design can release its subjected to additional loads other; displacement independent control system has better flexibility and adaptability, if single gap is prevented from shrinking, the other group is not affected by the gap still can continue to use.

- long service life

Based on the principle of anti fatigue design of the whole structure of SSFC expansion device, all the components are subjected to impact loading with high strength bolt connection, and is provided with a locking device, to avoid the welding stress caused by fatigue damage; which contributes to the later maintenance and replacement parts. The elastic bearing preload in any case of vehicle impact load can play a buffer and damping effect, and effectively protect the expansion device of the surrounding structures and support beams so that all parts of the life will be greatly extended.

In addition, the SSFC expansion device uses the parallel beam structure, the moving distance of the bridge is equal to the distance of the sliding structure in the telescopic device, and the life span of the telescopic device is longer than that of the oblique structure 30%~40%.

- earthquake

Due to the elastic displacement control system transfer and load, the elastic element in damping also has good effect on load play a damping effect at the same time, the intensity of the earthquake, between the expansion device and beam body pier or not due to excessive damage caused by rigid connection.

Water - tight

The waterproof rubber belt with multiple prepressing waterproof measures SSFC stretching device, 100% guaranteed not to leak into the expansion device of the substructure and the bridge body.

Working principle

The bridge structure in the wind load, temperature, shrinkage and creep, various internal and external factors, inevitably between girder and girder or beam and pier will produce relative displacement movement, structure characteristics of SSFC series expansion device which has excellent ability to adapt to the change of beam movement.

  

Specification model

Model: SSFC-E.

SSF- expansion joint Chinese letter abbreviation

C- serial code

E- represents the volume size

The same amount of expansion - expansion under the joint type, divided into A type, B type (unidirectional displacement) (bidirectional displacement)

Specification: SSFC series telescopic device is divided into 160mm, 240mm, 320mm,, 400mm777480mm, 560mm, 640mm, 720mm,, 800mm.2000mm a total of twenty-four levels.

performance parameter

Execution standard: 327-2004 JT/T < highway bridge expansion device >

Design load: Highway I level load

Stretching resistance: less than 4kN/m

Displacement: 0 ~ Emm (which E for each level of telescopic devices)

Plane rotation angle: + 0.06rad

Elevation angle: + 0.06rad

Installation dimensions

 

  

Type A (unidirectional displacement)
 

Type B (bidirectional displacement)
 


Model


Movement
mm


No. of cell
n


Gap of beam end
f(mm)

Size of recess

Recess

Place of steel bar
r(mm)

h(mm)

b1(mm)

b2(mm)

SSFC160

160

2

130

400

400

400

60

SSFC240

240

3

240

400

480

300

60

SSFC320

320

4

350

400

560

300

70

SSFC400

400

5

460

400

640

400

70

SSFC480

480

6

570

400

720

400

90

SSFC560

560

7

680

420

800

400

90

SSFC640

640

8

790

440

880

400

90

SSFC720

720

9

900

450

960

400

90

SSFC800

800

10

1010

460

1040

400

90

SSFC880

880

11

1130

500

1120

400

90

SSFC960

960

12

1250

500

1200

400

90

SSFC1040

1040

13

1370

540

1280

400

90

SSFC1120

1120

14

1490

560

1360

400

90

SSFC1200

1200

15

1610

590

1440

400

90

SSFC1280

1280

16

1730

590

1520

400

90

 

Note:

1 .the F value in the table is the gap between the beam and the middle temperature.

2 .if you need to set up a retractable device, we can provide special design.

3 .for more than the displacement of the situation, our company can carry out special design.

4 .B structure, b= (b1+b2) /2

 

The user must provide detailed information to the design of telescopic device factory

1 .installation of the bridge at the location of the bridge cross section;

2 .lane width and transverse slope;

3 .telescopic device and driving direction angle (right front included angle);

4 .requirements for retractable devices at the sidewalk or barrier;

5 .installation of telescopic device at a time when the temperature range and the average daily maximum, minimum temperature, annual extreme low temperature, very high temperature.